limitation: circular relationships in web services

revisit: http://hilaltarakci.blogspot.com/2009/09/cycle-is-detected-in-object-graph-this.html

object model can represent a graph at the server side and it must be serialized into an xml which can only represent a tree (not a graph especially with cycles) while using xml web services.. 

here is the same problem: http://forums.java.net/jive/thread.jspa?threadID=13670

the solution is here (in Turkish) :  http://egurbuz.wordpress.com/2009/10/27/jaxb-dongusel-baglari-xmlde-anahtarlma-cyclic-reference-problem/

CycleRecoverable is an interface which detects cycles on the implementing object and executes the method onCycleDetected when the object is about to serialize into XML. Thus it gives you a chance to break the cycles in the object graph and make it a tree, thus representable by xml. 

import com.sun.xml.bind.CycleRecoverable;

import com.sun.xml.bind.CycleRecoverable.Context;




public class Clazz implements  CycleRecoverable {


// ...

@Override

    public Object onCycleDetected(Context arg0) {

        // do whatever you do

        return object;

    }